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The Mound: Omen of Cthulhu Celebrates Halloween in the Lair of the Terrifying Tsathoggua

The free major update includes new items, enemies, and a revamped talent tree 

Lesquin, October 29, 2026 – ACE Team isn’t done giving the chills to adventurers around the world who love Lovecraftian stories: for Halloween, it has prepared new unspeakable terrors in the cooperative horror game The Mound: Omen of Cthulhu. The free major update, “The Cult of Tsathoggua,” is available now on PC, PlayStation®5, and XBOX Series X|S.

It is said, that among the many monstrosities inhabiting the cursed continent, some rise to the rank of deities. Tsathoggua is one such entity: an evil being with a grotesque appearance reminiscent of an oversized amphibian. The Great Old One lurks somewhere deep within the bowels of the cursed continent, and only the most daring adventurers can flush it out.

In addition to an area dedicated to Tsathoggua, this update introduces many new features:

  • Revamped Treasure Shrines: Collecting valuable items will be riskier, as some of them may alert nearby monsters, summon creatures, or deal damage to players.
  • New weapons and occult items to fend off monsters, and even pit them against each other.
  • Revamped progression: Players can now reach level 70 and spend their earned skill points to unlock additional abilities, such as resistance to bleeding, extra stamina, or movement speed.
  • New sanity effects: Are you sure you’re holding a sword or a spear in your hands…?

Since its July 15 release, The Mound: Omen of Cthulhu has received numerous updates. ACE Team, which is very responsive to its community, has already made several changes to improve the gameplay experience and game balance. With this update, the studio invites adventurers to delve even deeper into the horror.

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Inspired by the short story “The Mound” by the master of cosmic horror H.P. Lovecraft, The Mound: Omen of Cthulhu invites solo players or squads of up to four members to set out for an uncharted continent in search of a legendary city containing priceless treasures. Armed with 15th-century weapons, the vulnerable squad must advance cautiously to face unspeakable horrors while keeping a close eye on their dwindling sanity, which will cause panic and confusion within the group.

The Mound: Omen of Cthulhu is available in full crossplay on PC, PlayStation®5 and Xbox Series X|S. The Cult of Tsathoggua update is rolling out today on all platforms

About NACON
A company within the BIGBEN group, NACON was created in 2019 to optimize its expertise and leverage synergies in the video game market. Comprising 16 development studios, AA game publishing, and the design and distribution of premium gaming peripherals, NACON brings 40 years of experience to benefit the world’s gaming community. This unified center of excellence strengthens NACON’s position in the market and creates unique opportunities for innovation and competitive advantages.

About ACE Team
ACE Team is an independent video game development studio based in Santiago, Chile, known for creating unique and acclaimed titles like ‘Zeno Clash’, ‘Rock of Ages’ and ‘The Eternal Cylinder’. Founded by brothers Andres, Carlos, and Edmundo Bordeu, the company develops games for PC and major consoles, having earned multiple industry awards for its innovative and ambitious IPs. The studio has nearly two decades of experience in the games industry and is one of the leading game developers from Latin America.